High-Performance Fullerene Free Polymer Solar Cells Based on New Thiazole -Functionalized Benzo[1,2-b:4,5-b′]dithiophene D-A Copolymer Donors

Keshtov, M.L.; Konstantinov, I.O.; Kuklin, S.A.; Khokhlov, A.R.; Ostapov, I.E.; Xie, Z.; Komarov, P.V.; Алексеев, В.Г.; Dahiya, H.; Sharma, G.D.

Авторы: Keshtov M.L., Konstantinov I.O., Kuklin S.A., Khokhlov A.R., Ostapov I.E., Xie Z., Komarov P.V., Алексеев Владимир Георгиевич, Dahiya H., Sharma G.D.
Журнал: ChemistrySelect
Том: 6
Год издания: 2021
Первая страница: 7025
Последняя страница: 7036
DOI: 10.1002/slct.202101824
Аннотация: Two new wide bandgaps D􀀀 A copolymers compromising of same benzo [1,2-b:4, 5-b’] dithiophene functionalized with thiazole side-chain donor unit and different acceptors units, i.e., fluorinated benzotriazole (FBTA) (PBDTTZ-FBTA) and bisthiophene- thieno- benzothiazole (BTZ) (PBDTTZ-BTZ) were synthesized and their optical and electrochemical properties were investigated. These copolymers exhibit appropriate frontierenergy levels and complementary absorption to most middle and narrow bandgap non-fullerene small molecule non-fullerene acceptors. We have explored using these two copolymers as donors combined with a narrow bandgap non-fullerene acceptor, namely BThIND Cl, for the construction of polymer solar cells. The optimized polymer solar cells employing PBDTTZ-FBTA: BThIND-Cl showed overall power conversion efficiency of 14.96% (with energy loss of 0.51 eV), which is higher than that for PBDTTZ-BTZ: BThIND-Cl (11.68% withenergy loss of 0.56 eV). Although the PBDTTZ-BTZ exhibits a broader absorption profile than that of PBDTTZ-FBTA, the higher power conversion efficiency of the later copolymer may be correlated with the high charge carrier mobility, suppression of the bimolecular and trap-assisted recombination due to appropriate phase separation and compact π-π stacking distance in the active layer and low energy loss.
Добавил в систему: Комаров Павел Вячеславович

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High-Performance Fullerene Free Polymer Solar Cells Based on New Thiazole -Functionalized Benzo[1,2-b:4,5-b′]dithiophene D-A Copolymer Donorsстатья

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